Shania's test scores in 8 subjects were 88, 91, 85, 74, 69, 72, 80, and 87. which measure should shania use to find how much the scores on her tests vary, on average, from the mean score?

mode

mean absolute deviation

interquartile range

mean

Answer with explanation:

Test Scores of Shania's in 8 subject are: 88, 91, 85, 74, 69, 72, 80, and 87.

To calculate mean we add all the variate and divide by total number of Variate in the data set.

So, Mean of the Data set

To calculate , how much the scores on her tests vary, on average, from the mean score

We will Calculate mean absolute Deviation.

To calculate it,we will find absolute difference of each variate from mean.

| 88 - 80.75|=7.25

|91-80.75|=10.25

|85 -80.75|=4.25

|74-80.75|=6.75

......

........

Then Shania should calculate mean of the new data set obtained,which is absolute difference of each variate from mean.

→The Measure that,Shania should use to find how much the scores on her tests vary, on average, from the mean score is:

Mean absolute deviation

Mean absolute deviation

Step-by-step explanation:

Was correct on Edmentum

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3. 12.15, you are correct.

4.2.01, your first digit is correct,

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for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for